nl80211: add Guard Interval support for set_bitrate_mask

Allow to force SGI, LGI.
Mainly for test purpose.

Signed-off-by: Janusz Dziedzic <janusz.dziedzic@tieto.com>
Signed-off-by: Johannes Berg <johannes.berg@intel.com>

1 files changed, 7 insertions, 0 deletions

diff --git a/net/wireless/nl80211.c b/net/wireless/nl80211.c
index 09b6da8ffdfe..a3515ebbd32b 100644
--- a/net/wireless/nl80211.c
+++ b/net/wireless/nl80211.c
@@ -7447,6 +7447,7 @@ static const struct nla_policy nl80211_txattr_policy[NL80211_TXRATE_MAX + 1] = {
         [NL80211_TXRATE_HT] = { .type = NLA_BINARY,
                                 .len = NL80211_MAX_SUPP_HT_RATES },
         [NL80211_TXRATE_VHT] = { .len = sizeof(struct nl80211_txrate_vht)},
+        [NL80211_TXRATE_GI] = { .type = NLA_U8 },
 };
 
 static int nl80211_set_tx_bitrate_mask(struct sk_buff *skb,
@@ -7527,6 +7528,12 @@ static int nl80211_set_tx_bitrate_mask(struct sk_buff *skb,
                                         mask.control[band].vht_mcs))
                                 return -EINVAL;
                 }
+                if (tb[NL80211_TXRATE_GI]) {
+                        mask.control[band].gi =
+                                nla_get_u8(tb[NL80211_TXRATE_GI]);
+                        if (mask.control[band].gi > NL80211_TXRATE_FORCE_LGI)
+                                return -EINVAL;
+                }
 
                 if (mask.control[band].legacy == 0) {
                         /* don't allow empty legacy rates if HT or VHT